Characteristics of Burns Conducted under Modified Prescriptions to Mitigate Limited Fuels in a Semi-Arid Grassland

Augustine, David J.; Derner, Justin D.; Smith, David P.

doi:10.4996/fireecology.1002036

Fire Ecology

Table 1 Summary of fuel load, weather conditions, and measurements of heat during prescribed burns conducted in native shortgrass steppe at the Central Plains Experimental Range in northeastern Colorado. Each row represents the mean of 3 or 4 burns conducted on the same day. TC = thermocouple, RH = relative humidity.

From: Characteristics of Burns Conducted under Modified Prescriptions to Mitigate Limited Fuels in a Semi-Arid Grassland

Year	Season	Fuel load (kg ha⁻¹)	Air temp (°C)	Mean wind speed (m sec⁻¹)	RH (%)	Scale	Mean peak temp. (°C)	Max. peak temp. (°C)	Mean sec >60 °C	Min. sec >60 °C	Max. sec >60 °C	Mean heat dose₆₀ (°C sec)^a	Mean heat dose₀ (°C sec)^b	Min. heat dose₀ (°C sec)	Max. heat dose₀ (°C sec)	TCs (n)	TCs burned (%)
2007	Fall	698	20.2	7.8	6.9	16 ha	160.2	202.8	61	32	84	2 943	6 573	2 651	9 488	18	100
2008	Spring	499	11.1	3.8	12.0	400 m²	125.6	175.4	62	10	115	2 202	5 922	723	10 666	24	100
2008	Fall	549	11.0	10.8	33.6	16 ha	114.1	206.7	33	0	67	1 440	3427	0	8 844	18	83
2008	Fall	4 600	19.7	3.3	24.0	400 m²	108.7	157.3	65	33	124	1 732	5 602	2 022	11 379	24	100
2009	Spring	420	18.9	5.2	8.8	400 m²	126.3	168.4	55	29	105	2 083	5 396	2 005	9 591	24	100
2009	Spring	530	18.5	5.1	8.5	400 m²	147.8	195.1	65	41	89	3 149	7 039	3 599	12 105	24	100
2009	Fall	1 175	10.8	2.7	13.7	16 ha	158.4	210.7	98	58	145	4 489	10 396	5 162	16 092	18	100
2009	Fall	967	18.6	2.7	12.5	400 m²	169.5	207.7	78	29	101	4 273	8 934	2 047	11 607	24	100
2009	Fall	949	17.9	3.4	12.3	400 m²	170.7	215.6	106	51	152	5 720	12 054	4 018	20 565	24	100
2010	Spring	909	16.9	2.5	10.0	400 m²	135.6	193.9	57	0	80	2 594	6 037	0	10 804	24	96
2010	Fall	911	22.6	1.9	26.7	16 ha	143.6	261.1	154	103	209	8 640	17 865	12 064	25 049	18	100
2010	Fall	775	25.1	3.4	19.4	400 m²	159.9	193.2	68	34	94	3 738	7 803	3 019	12 238	24	100
2011	Spring	900	19.3	1.4	20.2	400 m²	168.4	208.9	62	29	92	3 713	7 425	3 348	11 253	24	100
2011	Fall	351	17.8	5.1	9.8	400 m²	107.1	144.3	32	0	52	925	2 828	0	5 579	24	83
2012	Spring	378	18.3	4.4	14.8	400 m²	115.4	136.0	45	0	58	1 603	4 316	0	5 885	24	96
2012	Spring	702	18.8	4.2	14.3	400 m²	186.7	264.7	82	55	105	5 483	10 383	5 440	16 399	24	100
2012	Fall	176	16.3	3.0	26.8	400 m²	60.3	89.5	13	0	64	173	970	0	5 315	24	42
2012	Fall	219	16.7	2.9	27.5	400 m²	76.8	125.2	29	0	121	796	2 543	0	15 639	24	58
2013	Spring	97	19.2	3.7	11.5	400 m²	61.5	85.8	25	0	105	254	1 759	0	7 013	24	54

^a Calculation comparable to Vermiere and Roth (2011) and Strong et al. (2013).
^b Calculation comparable to McDaniel et al. (1997, 2000).

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